Is it better to have a high or low sensitivity for the speaker? For example, the sensitivity is 87dB

The sensitivity of the speaker is not as high as possible. Normally, the sensitivity of a speaker is often improved at the expense of distortion, so the requirements for speaker sensitivity should not be too high.

Generally speaking, for every 3db difference in the sensitivity of a speaker, the sound pressure of its output will be about doubled; According to the regulations, the sensitivity level of 87db size is set as mid-range, and those below 84db size are called low sensitivity, and those above 90db size are called high sensitivity.

Extended information: The sensitivity of a loudspeaker can only reflect the size of the loudspeaker's sound pressure level when it is directed at a specific bandwidth and frequency signal. In other words, if two speakers with the same sensitivity index have different frequency responses, the output sound pressure level may be different when the same signal is played.

One of the decisive factors here is bandwidth.

According to the provisions of IEC60268-5, the sensitivity measurement of the speaker is to use a pink noise signal with a limited bandwidth, and its RMS voltage is equal to the square root of the rated impedance of the speaker, and the distance of 1 meter is used as a reference to determine the size of the sound pressure level.

The pink noise bandwidth is limited by the effective frequency range of the loudspeaker to be tested, in order to ensure that the test signal is within the effective output frequency range of the device under test. If a speaker cannot reproduce a signal below 150Hz, even if it is given a low-frequency signal below 150Hz, it will be of little use and will only cause the voice coil to heat up.

By the same token, if the speaker is unable to reproduce a signal higher than a certain frequency, there is no need to give it a higher frequency test signal.

The higher the sensitivity, the better.

The higher the sensitivity of the speaker, the sound pressure level of the speaker with the same power.

The higher it is, the louder the speaker will make. The sound pressure level generated by the device at a certain position at a certain input level (power).

Sound pressure level = 10 * log power + sensitivity. Basically, for every doubling of the sound pressure level, the sound pressure level increases by 1dB, but for every 1dB increase in sensitivity, the sound pressure level can increase by 1dB. This shows the importance of sensitivity.

In the professional audio industry,87db(,This parameter is counted as a low-end parameter,Generally belong to small-sized speakers(5 inches),The sensitivity of some speakers will exceed 90db,Some can reach more than 110。 For example, EAW, C-MARK, JBL, etc.

Generally speaking, the larger the size of the speaker, the higher the sensitivity, which I found after using the speaker. I didn't look for information, it was experience.

The speaker has a sensitivity parameter, you can see for yourself.

Du look at the parameters of the sound box.

DAO but the current sound box, I don't need it.

To choose sensitivity, the main choice is to match the power, impedance and power amplifier, and if the power of the power amplifier is larger, you can launch a good sound.

Only the bile power amplifier, because the output power is small, you need to choose a high-sensitivity old-fashioned paper-edged full-range speaker, the bass of the paper-edge horn is not good, the treble is not very good, and the midrange is the best.

The valve amplifier is also not good for bass and good for midrange.

The sensitivity of the paper edge horn is very good, and the larger the size, the higher the sensitivity. Equipped with tube power amplifier, it is best to choose a high-sensitivity horn.

Due to the large output power of the transistor power amplifier, the sensitivity of the speaker can be basically ignored.

If the output power of the power amplifier is small, you can choose a 4 ohm speaker, and a 4 ohm speaker is connected to an 8 ohm power amplifier, and the output power will be larger.

Among the parameters provided by a loudspeaker, the most important include four items: sensitivity, impedance, frequency response, and power rating. In this episode, let's introduce the first parameter, sensitivity. Because the sensitivity parameter directly determines whether the speaker is easy to push.

BT Audio is a gang of pyramid schemes, it's okay to fool the layman, and it's a bunch of garbage to listen to in person, and it's okay to keep it as furniture.

Look at the parameters of the speaker.

1. The tube amplifier is also not good for bass and good for midrange.

2. The sensitivity of the paper edge horn is very good, the larger the size, the higher the sensitivity.

3. The choice of high-sensitivity speaker for the power amplifier with electronic tube is the best match for the delay. 4. Due to the large output power, the sensitivity of the speaker can be basically ignored.

5. If the output power of the power amplifier is small, you can choose a 4 ohm hood missing land speaker, and a 4 ohm speaker connected to an 8 ohm power amplifier, and the output power will be larger.

The sound emitted by the speaker reaches a certain point of the sound pressure level value = speaker sensitivity + 10LG sensitivity is a very important technical indicator of the speaker unit, the definition of the sensitivity of the speaker unit is simply to supply the speaker unit 1W of electrical power, in the direction of the speaker axis (the direction pointed, that is.

loudest place) away from 1m, the measured sound pressure value (decibel value). The sensitivity of the speaker with high sensitivity can reach more than 100dB, while the lower speaker on the market is even more than 80dB

Sound pressure level, the human ear's perception of the change in the intensity of the sound is not proportional to the sound pressure, but to the logarithm of the sound pressure. The unit is dB.

It's not the same.

The sensitivity of the horn refers to the simple horn performance index, that is, the sensitivity performance index of the horn.

The speaker is different,Although they are all performance indicators,But the speaker is a relatively complete mechanism,Due to the volume of the more cabinet、Factors such as frequency division of the speaker,The performance index of the speaker will be changed,Multiple factors are combined together to become a complete mechanism,And this mechanism is affected by other factors,The sensitivity is naturally different from that of a single speaker。 In other words, the sensitivity performance index of this speaker.

For example, if a speaker has a sensitivity of 90dB in the bare test, put the speaker into a speaker cabinet, the sensitivity becomes 92dB, and then add a tweeter and crossover sensitivity to the cabinet to become 93dB. (Note: The example parameters are for reference only, and the actual parameters shall prevail).